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NET-680 Modify S7131: Add vbnet #4511

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Nov 15, 2024
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21 changes: 0 additions & 21 deletions rules/S7131/csharp/metadata.json
Original file line number Diff line number Diff line change
@@ -1,23 +1,2 @@
{
"title": "A write lock should not be released when a read lock has been acquired and vice versa",
"type": "BUG",
"status": "ready",
"remediation": {
"func": "Constant\/Issue",
"constantCost": "30min"
},
"tags": [
],
"defaultSeverity": "Major",
"ruleSpecification": "RSPEC-7131",
"sqKey": "S7131",
"scope": "All",
"defaultQualityProfiles": ["Sonar way"],
"quickfix": "infeasible",
"code": {
"impacts": {
"RELIABILITY": "HIGH"
},
"attribute": "LOGICAL"
}
}
24 changes: 2 additions & 22 deletions rules/S7131/csharp/rule.adoc
Original file line number Diff line number Diff line change
@@ -1,20 +1,5 @@

When using https://learn.microsoft.com/en-us/dotnet/api/system.threading.readerwriterlock[ReaderWriterLock] and https://learn.microsoft.com/en-us/dotnet/api/system.threading.readerwriterlockslim[ReaderWriterLockSlim] for managing read and write locks, you should not release a read lock while holding a write lock and vice versa, otherwise you might have runtime exceptions.
The locks should be always correctly paired so that the shared resource is accessed safely.

This rule raises if:

* you call https://learn.microsoft.com/en-us/dotnet/api/system.threading.readerwriterlock.acquirewriterlock[ReaderWriterLock.AcquireWriterLock] or https://learn.microsoft.com/en-us/dotnet/api/system.threading.readerwriterlock.upgradetowriterlock[ReaderWriterLock.UpgradeToWriterLock] and then use https://learn.microsoft.com/en-us/dotnet/api/system.threading.readerwriterlock.releasereaderlock[ReaderWriterLock.ReleaseReaderLock]
* you call https://learn.microsoft.com/en-us/dotnet/api/system.threading.readerwriterlockslim.enterwritelock[ReaderWriterLockSlim.EnterWriteLock] or https://learn.microsoft.com/en-us/dotnet/api/system.threading.readerwriterlockslim.tryenterwritelock[ReaderWriterLockSlim.TryEnterWriteLock] and then use https://learn.microsoft.com/en-us/dotnet/api/system.threading.readerwriterlockslim.exitreadlock[ReaderWriterLockSlim.ExitReadLock]
* you call https://learn.microsoft.com/en-us/dotnet/api/system.threading.readerwriterlock.acquirereaderlock[ReaderWriterLock.AcquireReaderLock] or https://learn.microsoft.com/en-us/dotnet/api/system.threading.readerwriterlock.downgradefromwriterlock[ReaderWriterLock.DowngradeFromWriterLock] and then use https://learn.microsoft.com/en-us/dotnet/api/system.threading.readerwriterlock.releasewriterlock[ReaderWriterLock.ReleaseWriterLock]
* or you call https://learn.microsoft.com/en-us/dotnet/api/system.threading.readerwriterlockslim.enterreadlock[ReaderWriterLockSlim.EnterReadLock], https://learn.microsoft.com/en-us/dotnet/api/system.threading.readerwriterlockslim.tryenterreadlock[ReaderWriterLockSlim.TryEnterReadLock], https://learn.microsoft.com/en-us/dotnet/api/system.threading.readerwriterlockslim.enterupgradeablereadlock[ReaderWriterLockSlim.EnterUpgradeableReadLock] or https://learn.microsoft.com/en-us/dotnet/api/system.threading.readerwriterlockslim.tryenterupgradeablereadlock[ReaderWriterLockSlim.TryEnterUpgradeableReadLock] and then use https://learn.microsoft.com/en-us/dotnet/api/system.threading.readerwriterlockslim.exitwritelock[ReaderWriterLockSlim.ExitWriteLock]


== Why is this an issue?

If you use the `ReaderWriterLockSlim` class, you will get a https://learn.microsoft.com/en-us/dotnet/api/system.threading.lockrecursionexception[LockRecursionException].
In the case of `ReaderWriterLock`, you'll get a runtime exception for trying to release a lock that is not owned by the calling thread.

include::../description-dotnet.adoc[]

=== Code examples

Expand Down Expand Up @@ -90,11 +75,6 @@ public class Example
}
----

== Resources

=== Documentation

* Microsoft Learn - https://learn.microsoft.com/en-us/dotnet/api/system.threading.readerwriterlock[ReaderWriterLock Class]
* Microsoft Learn - https://learn.microsoft.com/en-us/dotnet/api/system.threading.readerwriterlockslim[ReaderWriterLockSlim]
include::../resources-dotnet.adoc[]

include::../rspecator.adoc[]
15 changes: 15 additions & 0 deletions rules/S7131/description-dotnet.adoc
Original file line number Diff line number Diff line change
@@ -0,0 +1,15 @@
When using https://learn.microsoft.com/en-us/dotnet/api/system.threading.readerwriterlock[ReaderWriterLock] and https://learn.microsoft.com/en-us/dotnet/api/system.threading.readerwriterlockslim[ReaderWriterLockSlim] for managing read and write locks, you should not release a read lock while holding a write lock and vice versa, otherwise you might have runtime exceptions.
The locks should be always correctly paired so that the shared resource is accessed safely.

This rule raises if:

* you call https://learn.microsoft.com/en-us/dotnet/api/system.threading.readerwriterlock.acquirewriterlock[ReaderWriterLock.AcquireWriterLock] or https://learn.microsoft.com/en-us/dotnet/api/system.threading.readerwriterlock.upgradetowriterlock[ReaderWriterLock.UpgradeToWriterLock] and then use https://learn.microsoft.com/en-us/dotnet/api/system.threading.readerwriterlock.releasereaderlock[ReaderWriterLock.ReleaseReaderLock]
* you call https://learn.microsoft.com/en-us/dotnet/api/system.threading.readerwriterlockslim.enterwritelock[ReaderWriterLockSlim.EnterWriteLock] or https://learn.microsoft.com/en-us/dotnet/api/system.threading.readerwriterlockslim.tryenterwritelock[ReaderWriterLockSlim.TryEnterWriteLock] and then use https://learn.microsoft.com/en-us/dotnet/api/system.threading.readerwriterlockslim.exitreadlock[ReaderWriterLockSlim.ExitReadLock]
* you call https://learn.microsoft.com/en-us/dotnet/api/system.threading.readerwriterlock.acquirereaderlock[ReaderWriterLock.AcquireReaderLock] or https://learn.microsoft.com/en-us/dotnet/api/system.threading.readerwriterlock.downgradefromwriterlock[ReaderWriterLock.DowngradeFromWriterLock] and then use https://learn.microsoft.com/en-us/dotnet/api/system.threading.readerwriterlock.releasewriterlock[ReaderWriterLock.ReleaseWriterLock]
* or you call https://learn.microsoft.com/en-us/dotnet/api/system.threading.readerwriterlockslim.enterreadlock[ReaderWriterLockSlim.EnterReadLock], https://learn.microsoft.com/en-us/dotnet/api/system.threading.readerwriterlockslim.tryenterreadlock[ReaderWriterLockSlim.TryEnterReadLock], https://learn.microsoft.com/en-us/dotnet/api/system.threading.readerwriterlockslim.enterupgradeablereadlock[ReaderWriterLockSlim.EnterUpgradeableReadLock] or https://learn.microsoft.com/en-us/dotnet/api/system.threading.readerwriterlockslim.tryenterupgradeablereadlock[ReaderWriterLockSlim.TryEnterUpgradeableReadLock] and then use https://learn.microsoft.com/en-us/dotnet/api/system.threading.readerwriterlockslim.exitwritelock[ReaderWriterLockSlim.ExitWriteLock]


== Why is this an issue?

If you use the `ReaderWriterLockSlim` class, you will get a https://learn.microsoft.com/en-us/dotnet/api/system.threading.lockrecursionexception[LockRecursionException].
In the case of `ReaderWriterLock`, you'll get a runtime exception for trying to release a lock that is not owned by the calling thread.
21 changes: 21 additions & 0 deletions rules/S7131/metadata.json
Original file line number Diff line number Diff line change
@@ -1,2 +1,23 @@
{
"title": "A write lock should not be released when a read lock has been acquired and vice versa",
"type": "BUG",
"status": "ready",
"remediation": {
"func": "Constant\/Issue",
"constantCost": "30min"
},
"tags": [
],
"defaultSeverity": "Major",
"ruleSpecification": "RSPEC-7131",
"sqKey": "S7131",
"scope": "All",
"defaultQualityProfiles": ["Sonar way"],
"quickfix": "infeasible",
"code": {
"impacts": {
"RELIABILITY": "HIGH"
},
"attribute": "LOGICAL"
}
}
6 changes: 6 additions & 0 deletions rules/S7131/resources-dotnet.adoc
Original file line number Diff line number Diff line change
@@ -0,0 +1,6 @@
== Resources

=== Documentation

* Microsoft Learn - https://learn.microsoft.com/en-us/dotnet/api/system.threading.readerwriterlock[ReaderWriterLock Class]
* Microsoft Learn - https://learn.microsoft.com/en-us/dotnet/api/system.threading.readerwriterlockslim[ReaderWriterLockSlim]
2 changes: 2 additions & 0 deletions rules/S7131/vbnet/metadata.json
Original file line number Diff line number Diff line change
@@ -0,0 +1,2 @@
{
}
65 changes: 65 additions & 0 deletions rules/S7131/vbnet/rule.adoc
Original file line number Diff line number Diff line change
@@ -0,0 +1,65 @@
include::../description-dotnet.adoc[]

=== Code examples

==== Noncompliant code example

[source,vbnet,diff-id=1,diff-type=noncompliant]
----
Public Class Example
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Wau, so much VB and I have nothing to complain about!

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And did you noticed how much nicer it looks compared to the C# bracket mess?

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Bless CoPilot :P

I just added 2 new lines after that.


Private Shared rwLock As New ReaderWriterLock()

Public Sub Writer()
rwLock.AcquireWriterLock(2000)
Try
' ...
Finally
rwLock.ReleaseReaderLock() ' Noncompliant, will throw runtime exception
End Try
End Sub

Public Sub Reader()
rwLock.AcquireReaderLock(2000)
Try
' ...
Finally
rwLock.ReleaseWriterLock() ' Noncompliant, will throw runtime exception
End Try
End Sub

End Class
----

==== Compliant solution

[source,vbnet,diff-id=1,diff-type=compliant]
----
Public Class Example

Private Shared rwLock As New ReaderWriterLock()

Public Shared Sub Writer()
rwLock.AcquireWriterLock(2000)
Try
' ...
Finally
rwLock.ReleaseWriterLock()
End Try
End Sub

Public Shared Sub Reader()
rwLock.AcquireReaderLock(2000)
Try
' ...
Finally
rwLock.ReleaseReaderLock()
End Try
End Sub

End Class
----

include::../resources-dotnet.adoc[]

include::../rspecator.adoc[]
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